Understanding the Mixer EQ

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Mark Bliss
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Understanding the Mixer EQ

Post by Mark Bliss » Sat Jan 13, 2018 9:13 am

The mixer EQ has "fixed" frequencies and "Q"

Here is a pink noise spectrograph with the mixer EQ set "flat"-
Pink Noise -12dB RMS.png
Pink Noise -12dB RMS.png (469.69 KiB) Viewed 1522 times
And here is the same audio signal with the EQ set to full cut in all three frequencies-
Pink Noise mixer cut.png
Pink Noise mixer cut.png (506.78 KiB) Viewed 1522 times
And again at full boost-
Pink Noise mixer full boost.png
Pink Noise mixer full boost.png (476.01 KiB) Viewed 1522 times
Noting the frequencies affected:
The bass is a shelf filter, rolling off at about 300. Range is +/- 15 dB.
The treble is a shelf filter, rolling off at about 5K. Range is +/- 15 dB.
The mid frequency is a bell filter based a little below 3K, Range is +/- 12 dB.

Also of interest is the effect on RMS and peak levels.

My conclusion- I use the low and high frequencies often in mixing for subtle adjustments. The limits of the range of boost/attenuations mean they arent really for "big moves"
(IE turning down the low freq. to max cut isn't a HPF for example)

I dont use the mid range much. Its utility is limited due to its "fixed" frequency and "Q"

(* Suggestions have already been logged to update this in the future. Suggestions include adding a sweepable freq. range function and adjustable Q.)
Stay in tune, Mark

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msnickybee
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Re: Understanding the Mixer EQ

Post by msnickybee » Fri Jan 26, 2018 6:50 am

Useful stuff!
I actually do sometimes use the Mixer EQ - maybe I'm in the minority there - but only for subtle quick tweaks as you describe.
Nicky
MC8.1 PS user since v5
My latest EP Bittersweet is now available on Spotify
or check out my YouTube channel

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